Reese Witherspoon shouted out Will Ferrell on his birthday, making fans even more excited for their film: You're Cordially Invited.

Chris Evans recently celebrated his birthday, and thanked fans for all the love.

Michael J. Fox celebrated his birthday, and the Back to the Future franchise was one of many to celebrate the actor.

The Princess Bride star remembers his large friend.

Sam Neill Wishes Jeff Goldblum a hilarious happy birthday.

Dwayne Johnson proved yet again what a nice guy he is by singing “Happy Birthday” for a woman’s 102nd birthday.

Jackass' Bam Margera's Birthday followed him being taken to rehab

James Gunn went behind the scenes for Idris Elba's birthday.

Is this a hint that Keanu Reeves is joining the MCU?

Happy Thor's-day, on a Wednesday

Jason Momoa celebrated a birthday, and Lenny Kravitz showed him some serious love online.

Tom Felton had the best Harry Potter-oriented birthday post for his onscreen sparring partner Daniel Radcliffe.

I honestly can't get enough of Dax Shepard's and Kristen Bell's love story.

It's a very Marvel-ous birthday for Chris Hemsworth's wife Elsa Pataky.

Fans have been debating the best Chris for a while, and Hemsworth is in on the joke.

Prepare to see Dobby like you've never seen him before.

Tons of expected Spider-Man jabs.

Mix yourself a Vesper and raise a glass for this red letter day in James Bond history!

Paul Rudd is celebrating a birthday, and Mark Ruffalo poked fun in the perfect way.

Yesterday was Reese Witherspoon's birthday, and Jennifer Garner shared a sweet post.